APA (7th ed.) Citation

Oxford University Press & Willmore, T. J. An introduction to differential geometry.

Chicago Style (17th ed.) Citation

Oxford University Press and T. J. Willmore. An Introduction to Differential Geometry.

MLA (8th ed.) Citation

Oxford University Press and T. J. Willmore. An Introduction to Differential Geometry.

Warning: These citations may not always be 100% accurate.